[PATCH v2 0/3] USB: add generic onboard USB HUB driver

[Fabio Estevam]

Hi Peter,

On Wed, Dec 16, 2015 at 2:11 AM, Peter Chen <peter.chen at freescale.com> wrote:

> Thanks, Fabio, but I am curious how things like that? The USBOH3 clock
> is not opened, the usb driver will hang when it tries to access
> registers. If this clock is always on, then, why the system will
> hang later?

I found the issue with your patch. You missed to add the pinctrl node.

With the change below USB is functional in Udoo:

--- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi
@@ -22,6 +22,8 @@

        usb_hub1 {
                compatible = "generic-onboard-hub";
+               pinctrl-names = "default";
+               pinctrl-0 = <&pinctrl_usbh>;
                clocks = <&clks IMX6QDL_CLK_CKO>;
                reset-gpios = <&gpio7 12 GPIO_ACTIVE_LOW>;
                reset-duration-us = <2>;